Publications
USGS divers in the Elwha River
WFRC zebrafish laboratory
Processing a Lost River sucker
Below is a list of available WFRC peer reviewed and published science.
Filter Total Items: 2475
Hematology of healthy and virus-diseased sockeye salmon, Oncorhynchus nerka
No abstract available
Authors
M.E. Watson, R.W. Guenther, R.D. Royce
Histopathology of kidney disease in fish
Kidney disease is one of the most puzzling fish diseases known to exist in the United States. In less than Io years it has invaded the Pacific Northwest, exacting a heavy toll of hatchery salmon. Its first appearance apparently was in Massachusetts where Belding and Merrill' described a disease similar to that now seen on the Pacific Coast. In I946 it was diagnosed in Washington2 and since that ti
Authors
E. M. Wood, W. T. Yasutake
Histopathology of fish. IV. A granuloma of brook trout
In the summer of 1952, Snieszko and Griffin (1955) diagnosed kidney disease in brook trout from the Fish and Wildlife Service's station at Berlin, New Hampshire. During the examination of these fish, a peculiar lesion was observed in the vicinity of the gastric caeca. In very advanced cases, hard, glistening, white masses of tissue bearing a striking resemblance to mature testes often filled the a
Authors
E. M. Wood, W. T. Yasutake
Histopathology of fish. III. Peduncle ("cold-water") disease
No abstract available.
Authors
E. M. Wood, W. T. Yasutake
Histopathology of fish. II. The salmon-poisoning fluk
THE SALMON-POISONING FLUKE is misnamed as far as the fish culturist is concerned, for the disease affects dogs, not fish. There is considerable evidence, however, that fish may also suffer from the complex chain of events leading from snail to dying dog. Histological studies indicate that young salmon and trout may be severely damaged by the encysted stage of the fluke.
The killifish, fundulus heteroclitus, second intermediate host of the trematode, Ascocotyle (Phagicola) dimunuta
Ascocotyle (Phagicola) diminuta was described by Stunkard and Haviland (1924)from the intestine of wild rats collected at the Clason Point dump near New York by the City Board of Health. Feeding experiments have demonstrated that metacercariae encysted in the gills of the common killifish, Fundulus hetero clitus, are stages in the life-cycle of this parasite. The larvae have been found also, altho
Authors
H. W. Stunkard, Joseph R. Uzmann
Infectious pancreatic necrosis in brook trout
No abstract available.
Authors
E. M. Wood, S. F. Snieszko, W. T. Yasutake
A mycosis-like granuloma of fish
Mycoses of systemic distribution are rarely observed in fresh-water fish in this country. In a recent review of atypical cell growths in fishes, Nigrelli cited the only known instance of a mycetoma in a North American fresh-water fish which occurred in the head of fingerling landlocked salmon from an Idaho hatchery. The fungus associated with this granuloma was characterized by a branching septate
Authors
E. M. Wood, W. T. Yasutake, W. L. Lehman
Histopathology of fish: I. Techniques and principles
The techniques of histopathology have been used for many years in the study of human and animal diseases. Until very recent times, however, histology has been applied to fish studies only very infrequently. This brief discussion is intended to acquaint the reader with the techniques and principles involved and to explain how histological studies may help to overcome fish diseases and nutritional p
Authors
E. M. Wood, W. T. Yasutake
Infectious diseases of Pacific salmon
Investigations on infectious diseases of Pacific salmon due to micro-organisms other than viruses are reviewed. The etiological agents include trematodes, fungi, protozoa and bacteria. Bacteria have been found to be the most important agents of disease in the several species of Pacific salmon. Kidney disease, due to a small, unnamed Gram-positive diplobacillus, causes serious mortalities in young
Authors
Robert R. Rucker, B. J. Earp, E. J. Ordal
A virus disease of sockeye salmon: Interim report
Since 1951 a disease, usually occurring in late spring or early summer, has caused severe losses in 3- to 12-month-old fingerling sockeye salmon in hatcheries in the State of Washington. The disease is characterized by an explosive outbreak, mortality usually 80 percent or greater, and a residual spinal deformity in a small percentage of the surviving fish, and its specificity for the one species
Authors
S.W. Watson, R.W. Guenther, R.R. Rucker
Virus diseases of fish
Viruses are probably the cause of a wide spectrum of fish diseases. Although relatively few virus diseases of fish are known today, some of the diseases of unknown etiology, as well as some diseases presently accepted as due to bacteria, protozoa, fungi or nutritional deficiencies, possibly will be recognized eventually as virus diseases.
Some viruses may induce proliferative tissue changes wherea
Authors
Stanley W. Watson